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PIsToN METER.

No. 888,714. Patented Aug. 28, 1888.

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` PISTON METER.. No. 388,714. Patented Aug. 28, 1888.

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'Wvmeeseez Xmvemiwi INTED STATES .PATEN'F OFFICE.

FRITZ PERRET, OF CHAUX-DE-FONDS, SWITZERLAND.

PISTON METER.

SFECIFICATION forming part of Letters Patent No. 388,714, dated .August 28, 1838.

Application tiled May 31, 1888. Serial No. 275,572. (No model.) Patented in France September 17, 1887, No. 185,911.

V.To @ZZ whom it may concern:

Be it known that I, FRITZ PERRET, a citizen of the Republic of Switzerland, residing at GhauX-de-Fonds, Switzerland, have invented new and useful Improvements in Meters for Water and other Liquids, (for which I have obtained a patent in France, No. 185,911, dated September 17, 1887,) of which the following is a specilication.

Thisinvention relates to a meter adapted for measuring water and other liquids, as set forth in the following specification and claim, and illustrated in the accompanying drawings, in which- Figure lis a section of a meter in the plane x Fig. 2. Fig. 2 is a section in the planey y, Fig. 1. Fig. 3 is a section in the plane z z, Fig. 2. Fig. 4 is a section in the plane w fr', Fig. 2. Fig. 5is a section in the plane y y', Fig. 2. Fig. 6 is a section in the plane z z', Fig. 2. In Figs. 4, 5, and 6 the moving parts are removed. Y

Similar letters indicate corresponding parts.

In the drawings, the letters A A' represent cylinders, and B is a distributing box or chest.

In this description the front part of each cylinder is the part at the chest B,and the rear part of the cylinder is that part which is away from the chest B. In the cylinders move the pistons P P',provided with rodsT T'. The chest Bhas openings 1, 2, 3, 4, 5, and 6. The opening 1 is a port to feed water or liquid to the front of the cylinder A'. 3 is a port for the rear of cylinder A'. 4 is a port for the front of cylinder A. 6 is a port for the rear of cylinder A. 2 is an exhaust for cylinder A', and 5is an eX- haust for cylinder A. The chest B is closed by the cover C. The water to be measured enters the chest B by the channel M and leaves the apparatus through the channel N, Fig. 6, said channel Nv being made to receive the water from the exhausts 2 and 5. The valve t communicates with the cylinder A. Said valve is actuated by the rod l of the piston P. The valve t', which communicates with the cylinder A, is actuated by the rod T' of the piston P'. To each valve is fixed one of the sleeves F F', in which slide the rods T T. The pistonrods have shoulders f f', which strike against the closed end of the sleeves and against rims at the open ends of said sleeves.

Fach piston its stroke, each piston thus actuating the feed for the cylinder of the other piston.

The pistons are shown composed of two leather washers inclosed in two metallic disks; but any construction securing a securely-fitting piston can be employed. The piston-rods and openings 1 to V6 can be situated in a right line; but by employing the arrangement shown in the drawings the Yapparatus is shortened.

The device operates as follows: Starting from the position shown in Fig. 2, the ports3 and 6 being open, the water-pressure is trans mitted through the port 3 to the rear of the cylinder A' and holds the piston P' toward the front of said cylinder. Also, the water ilowing through the port 6 presses on the rear of the piston P, the front of said piston being in communication with the exhaust 5 through the valve t'. y The piston P is then moved toward the chest B. Toward the close of the stroke of the piston the piston-rod T strikes against the closed end of the sleeve F and the valvet is moved so as to close the port 3 and open the port 1. The rear of cylinder A' is then in communication with the exhaust 2, and the port 1 being opened the water llows to the front of said cylinder A', the piston P' moves toward the rear of the cylinder A', and the piston P comes to rest. The piston P, having passed to can move freely over a portion of its course and only actuates a valve toward the close of the front of cylinder A, is held there by the Vpressure of water from the port 6 until this port is put in communication with the exhaust. Meanwhile the piston P' presses toward the rear of the cylinder A'. Upon the piston P' coming near the end of its stroke it actuates the valve t', so as to bring the port into communicationA with the exhaust 5, and the port 4 is thus opened. Upon theport 4 leading the water to the front of cylinder A the piston PA IOO stroke the pistons and valves have resumed the position shown in Fig. 2. The operation of the apparatus continues on in this manner.

The registration is made by a usualsuitable registering mechanisin,whieh,being placed on thedistributing-chest,allows the quantityofliqnid which has passed through the cylinderssuch as liters and cubic meters--to be read. The movement of the registering mechanism can be controlled by one of the pistons which causes the hand or indicating wheel to be actuated at each stroke.

What I claim as new, andA desire to secure by Letters Patent, is-

The combination, in a Huid meter, of the two cylinders, the chest interposed between and secured to the inner adjacent ends of the cylinders, the ports leading respectively from the chest to the front and rear ends of the cylin- Witnesses:

J. A. BOILLAT, L. N. DUooMMUN-JEANNERET.

. .FRITZ PERRET. [L S.] 

